Short answers, pulled from the story.
The album was released on the 17th of December 2013 to extend copyright protection on the recordings under EU law. Under European Union rules, sound recordings are protected for 70 years only if formally released; releasing the album before the end of 2013 extended protection by 20 years.
The compilation contains 59 previously unreleased recordings. It includes 15 studio outtakes and 42 live BBC Radio tracks.
John Lennon's demo recordings of "Bad to Me" and "I'm in Love" are included on the album. "Bad to Me" was later released as a single by Billy J. Kramer and the Dakotas, and "I'm in Love" was released as a single by the Fourmost.
The album was released exclusively through the iTunes Store. It was initially available for only a few hours before being taken down, then later made available for purchase again.
The 42 BBC Radio tracks on the 2013 compilation add to recordings previously released on Live at the BBC (1994) and On Air - Live at the BBC Volume 2 (2013). All three releases draw from the Beatles' BBC Radio sessions.
Tracks 1 through 14 are stereo; the remaining recordings are mono.